Checking the regulator for proper action – Dwyer 38R User Manual
Page 11
Series 38R ••• Self-Acting Temperature Control Valves
Operation, Installation & Maintenance Manual
CHECKING THE REGULATOR FOR PROPER ACTION
(continued)
Page 11
INSPECTING Valve Body Assembly
1.
Remove the Valve Body Assembly from the actuator.
(See section on “Removing Valve Body Assembly”)
2.
By gloved hand, alternately push the valve stem down and pull up. There should be at least 1/4” of motion.
3.
If no motion is seen, the valve is jammed.
A. Remove valve from line and inspect for debris caught between the valve seat and the valve plug
preventing the valve from closing.
Disassembly of the valve may be required. (See section on “Reversing Valve Action”)
4.
If debris is successfully removed and valve reassembled, repeat step 2.
5.
I no motion is seen, obtain a new valve.
6.
If valve is now working, or new valve obtained, reassemble valve to actuator.
(See section on “Replacing Valve Body Assembly”)
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